The concept of the diffraction limit put forth by Ernst Abbe and others has been an important
guiding principle limiting our ability to tightly focus classical waves, such as light and sound …

Acoustic waves have been widely applied in communications, medical treatment, military,
and other aspects. In this Letter, we explore acoustic imaging properties of three …

Maxwell's fish-eye lens (MFEL) with positive refraction has been shown to achieve perfect
imaging, but with the cost of drain assistance. This has led to ongoing heated debates about …

A circular graded index lens is conformally transformed to an elliptical shape using a closed-
form transformation. The proposed transformation is then employed to compress a Maxwell …

Evidence for subwavelength imaging with positive refraction Page 1 This content has been
downloaded from IOPscience. Please scroll down to see the full text. Download details: IP …

Reply to comment on 'Perfect imaging without negative refraction' Page 1 This content has been
downloaded from IOPscience. Please scroll down to see the full text. Download details: IP …

Despite strong experimental and theoretical evidence supporting superresolution imaging
based on microlenses, the imaging mechanisms involved are not well understood. Based on …

We demonstrate the beneficial effects of introducing glide symmetry in a two-dimensional
periodic structure. Specifically, we investigate dielectric parallel plate waveguides …

Materials that refract light backwards are thought to be required for making super-resolution
lenses. An alternative proposal—that conventional, positively refracting media can do the …

Recent claims that Maxwell's fish-eye is a perfect lens, capable of providing images with
deep subwavelength resolution, are examined. We show that the imaging properties of a …